package collecttion;

import java.util.ArrayList;
import java.util.Collection;

public class CollectionDemo2 {
    public static void main(String[] args) {
        Collection c = new ArrayList();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        c.add(new Point(9,0));
        /*
            集合重写了toString方法,格式如下:
            [元素1.toString(), 元素2.toString(), 元素3.toString(), ...]
         */
        System.out.println(c);

        Point p = new Point(1,2);
        boolean contains = c.contains(p);
        System.out.println("是否包含："+contains);

        c.remove(p);
        System.out.println(c);
    }
}
